Copyright © 2026 Unity Technologies
Thank you for reporting a bug to Unity. Our investigation indicates the issue originates from a third-party asset, plugin, or service (i.e Steam or Windows), rather than Unity itself. Because the problem lies outside our codebase, we're unable to address it directly. We will close this case as a third-party issue. We recommend contacting the vendor or maintainer for support. If you have evidence that the issue is within Unity, please share it and we will re-open the investigation.
How to reproduce:
1. Open the attached “IN-92001.zip” project
2. Navigate to File → Build Profiles
3. Select “Windows, Mac, Linux” platform and click the “Build“ button
4. Open Steam and navigate to “Add a Game” → “Add a Non-Steam Game…” → “Browse…“ and select the “Input_System_Duplicate.exe“
5. Go to the Steam “Library” page and locate the “Input_System_Duplicate” game
6. Right-click the game, select Properties → Controller, and set “Override for Input_System_Duplicate” to “Enable Steam Input”
7. Press the “Play” button
8. Press the “X“ button on the Xbox 360 Wireless controller
Expected result: One player is added to the game
Actual result: Two players are added to the game
Reproducible in: 1.9.0 - 1.14.0 (6000.0.18f1), 1.14.1 (2022.3.65f1, 6000.0.18f1, 6000.0.54f1, 6000.1.12f1, 6000.2.0b10, 6000.3.0a2)
Reproducible on: Windows 11 Pro (23H2), Windows 11 Enterprise (24H2)
Not reproducible on: No other environments tested
Notes:
Issues you vote on will appear here